Composite sheets constituting electromechanical transducers and transducers equipped with such sheets
USRE32180E · kind E · reissue
Inventors
Key dates
| Filing date | Nov 15, 1984 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Nov 15, 2004 |
Classification
- Technology area (CPC —)General
Abstract
.[.The invention relates to a flexible composite sheet designed to constitute an undersheet behaving as an electromechanical transducer in order to detect the apnea of subjects lying on it. This sheet comprises, in addition to a foil sensitive to pressure in the sense of electromechanical transduction (an electret or polarized piezoelectric foil), two film electrodes and two protective foils. Spacing shims are glued to the two foils against which they are juxtaposed. When the sensitive foil is an electret, the shims are directly interposed between the sensitive foil and one of the two electrodes. When the sensitive foil is a polarized piezo-electric foil, the shims are directly interposed between one of the electrodes and the corresponding external protective foil..]. .Iadd.An apnea monitor/alarm consists of an electronic monitor circuit to actuate an alarm responsive to the output of a sheet-like electromechanical transducer. The transducer consists of an electret or polarized piezoelectric foil responsive to pressure to generate corresponding electrical signals, two film electrodes, and two protective foils. Shims are glued to two of the foils for spacing. If an electret sensor f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.